Chemistry

Chemistry of Gases and Applications

1,190 Questions

The chemistry of gases covers atmospheric composition, noble gases, and various applications of gas compounds in industrial and biological processes. Understanding the properties of common gases, their reactions, and environmental occurrences is vital for general science sections. Use these questions to practice identifying gases and their specific uses.

Atmospheric gasesNoble gasesGas applicationsChemical compounds

Chemistry of Gases and Applications Questions

Multiple choice
  1. HCl

  2. Helium gas

  3. Proteins

  4. Plastics

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is a nobel gas. Nobel gases experience london dispersion force. The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction. London forces are the attractive forces that cause nonpolar substances to condense to liquids and to freeze into solids when the temperature is lowered sufficiently.

Multiple choice
  1. Freon

  2. Neon

  3. Boron

  4. Krypton

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Freon is a trade name for a group of chlorofluorocarbons (CFCs) and related compounds used primarily as refrigerants. Neon, Boron, and Krypton are chemical elements.

Multiple choice
  1. Water vapours

  2. O2 gas

  3. N2

  4. Inert gases

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The earth's atmosphere near the surface is composed primarily of Nitrogen and Oxygen. Together, the two comprise about 99% of the gas in the atmosphere. Percentage of Nitrogen in the atmosphere is about 78.084% which is the maximum amount.

Multiple choice
  1. emulsion

  2. aerosol

  3. gel

  4. sol

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A gel is a colloid where a liquid is dispersed in a solid medium. Examples include jelly or butter.

Multiple choice
  1. they are easily affected by oxidising agents

  2. they show variable valencies

  3. their outermost shell is complete

  4. they are chemically inactive

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Noble gases are also known as inert gases and do not take part in chemical reactions.

Multiple choice
  1. cold water

  2. warm water

  3. soft water

  4. hard water

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hard water contains dissolved calcium and magnesium ions that react with soap to form an insoluble precipitate known as scum. This prevents the soap from forming a lather, thereby reducing its cleaning effectiveness.